Hamlin was fastest in the first 50-minute practice at 204.904 mph. Kevin Harvick was second with a speed of 203.688, and Kyle Busch, who had mechanical issues early in practice, was third at 203.684 mph.
Corey Lajoie and Michael McDowell rounded out the top five.
All 40 cars participated in the first session, which was only stopped once for debris on the track.
The effect of turbulence is mesmerizing.
— NASCAR on NBC (@NASCARonNBC) October 11, 2019
Single-car runs dominated the second practice, whereas the first practice saw multiple cars practice drafting. Thirty-three teams participated, including all 12 playoff teams, in the incident-free second session.
Qualifying is scheduled for 4:35 p.m. ET tomorrow on NBC Sports Network.